Mr. Bad.

A young girl, Nan Xing, who loves to write, accidentally summons the villain Xiao Wudi from the novel she wrote when she makes a wish. The clever and cunning Xiao Wudi, who just came to this world, threatened Nan Xing to allow him to stay in the apartment next to hers. They then start on their love-hate relationship and daily lives that one would never find mundane.